About Rancho San Diego CDP, California
Rancho San Diego is a census-designated place (CDP) in San Diego County, California. The population was 17,049 at the 2010 census.
Rancho San Diego is located in the southeastern corner of San Diego County, east of the city of El Cajon. Rancho San Diego is bordered by La Mesa to the northwest, Lemon Grove to the northeast, and Spring Valley to the southeast.
Rancho San Diego has a Mediterranean climate. The average January temperature is 59 degrees Fahrenheit, and the average July temperature is 77 degrees Fahrenheit.
Rancho San Diego was developed as a master-planned community in the 1970s. The community is home to several parks and recreation facilities, as well as a retail center and businesses.